We need . . . . . . . . bottle of water. A. a B. an C. the D. no article

The correct answer is D. no article.

We use articles (a, an, the) to determine whether we are talking about a specific or general thing. In this case, we are not talking about a specific bottle of water, but any bottle of water. Therefore, we do not need an article.

Here are some examples of when we would use articles:

• I saw a bottle of water on the table. (We are talking about a specific bottle of water.)
• The bottle of water is empty. (We are talking about a specific bottle of water that we have already mentioned.)
• I like to drink water. (We are talking about water in general, not a specific bottle of water.)